521085129 has 8 divisors (see below), whose sum is σ = 696531840. Its totient is φ = 346514256.

The previous prime is 521085101. The next prime is 521085133. The reversal of 521085129 is 921580125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521085129 - 2¹¹ = 521083081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521085129.

It is not an unprimeable number, because it can be changed into a prime (521085329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217569 + ... + 219950.

It is an arithmetic number, because the mean of its divisors is an integer number (87066480).

Almost surely, 2^521085129 is an apocalyptic number.

It is an amenable number.

521085129 is a deficient number, since it is larger than the sum of its proper divisors (175446711).

521085129 is a wasteful number, since it uses less digits than its factorization.

521085129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437919.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 521085129 is about 22827.2891294608. The cubic root of 521085129 is about 804.7041228393.

The spelling of 521085129 in words is "five hundred twenty-one million, eighty-five thousand, one hundred twenty-nine".